Adjective phantom has 1 sense
  1. phantom - something apparently sensed but having no physical reality; "seemed to hear faint phantom bells"; "the amputee's illusion of a phantom limb"
    real (indirect, via unreal)
,Noun phantom has 2 senses
  1. apparition, phantom, phantasm, phantasma, specter, spectre - a ghostly appearing figure; "we were unprepared for the apparition that confronted us"
    --1 is a kind of spirit, disembodied spirit
    --1 has particulars: Flying Dutchman
  2. apparition, phantom, phantasm, phantasma, shadow - something existing in perception only; "a ghostly apparition at midnight"
    --2 is a kind of illusion, semblance
    --2 has particulars:
     unidentified flying object, UFO, flying saucer; Flying Dutchman; ghost, shade, spook, wraith, specter, spectre